From that start date (to the end date, if applicable): The particular days and times the rule(s) will be active.

An indication if all incoming calls will be affected—or only those from certain caller IDS.

AND/OR

If all, or indicated caller-ID, calls should go to:

A Standard user (via voicemail or fax number) of that auto-attendant

An Info-Only extension of that auto-attendant

The same auto-attendant but with a different greeting

Another auto-attendant, wit the same or other greeting

Examples of advanced rules one may create for a particular auto-attendant (say, Ames Company) are:

Rule Name

Example Rule

Customer Service Menu

Starting November 1, 2015, all calls will immediately go to (auto-attendant) Ames Customer Service until further noted. (This is a good example if, say, the main office will be closed until notice.)

Caller-ID Rule to John Smith

Starting November 1, 2015, all calls from 213-555-1212 and 213-555-1234 will go to John Smith's voicemail. (The incoming calls will follow John's call-routing rules; for information about call-routing rules, see Caller ID Routing.)

Fax Rule to John Smith

From December 23, 2015 to December 26, 2015, between 8AM and 8PM, all calls will go to John Smith's fax number.

Holiday Info-Only Rule

From December 23, 2015 to December 26, 2015, between 8AM and 8PM, all calls will go to Hiatus Information (an Info-Only extension).

Holiday-Season Rule

From December 25, 2015 to January 1, 2016—between 8AM and 8PM every Monday, Wednesday, and Friday—all calls will to (auto-attendant) Ames Customer Service.

Holiday-Greeting Rule

From November 23, 1015 to January 1, 2016, all calls will still go to the same auto-attendant (Ames Company) but will be presented with a holiday greeting.

Customer-Service Holiday-Greeting Rule

From November 23, 2015 to January 1, 2016, all calls will go to (auto-attendant) Ames Customer Service and will be presented with a holiday greeting.